1. Kordesch, K. V.: 25 Years of Fuel Cell Development (1951–1976). J. Electrochem. Soc.125, 77C - 91C (1978).
2. NEMA Standard, Publ. No. CV 1–1968, National Electrical Mfgs. Assoc., New York (1968).
3. Ostwald, W.: Z. Electrochem.1, 122 (1894).
4. Grove, W. R.: Philos.Mag
3, 14, 127 (1839).
5. Nernst, W.: Deutsches Patent No. 259, 241, 1912.